Here you can find the source of writeString(DataOutputStream buf, String value)
public static void writeString(DataOutputStream buf, String value) throws IOException
//package com.java2s; /**//w ww .j a v a2s. c o m * Copyright (c) 2014 Virtue Studios * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ import java.io.DataOutputStream; import java.io.IOException; public class Main { public static void writeString(DataOutputStream buf, String value) throws IOException { if (value.contains("\0")) { throw new IllegalArgumentException("Null characters are not allowed in null-terminated strings."); } buf.writeBytes(value); buf.writeByte((byte) 0); } }